Sounds like your oven is off. Have you moved/changed appliances since last time you made a pumpkin pie? I’d get an oven thermometer and keep it in there. Also, make sure the pie is in the center of the oven.

Besides what PP said, if your pie is well done on top, but not inside, cover it loosely with foil. I do this when I make pecan pie, because it takes FOREVER to bake but the pecans will burn if it’s uncovered.

Side note: The first time I made brownies from scratch, I was ~12. My friend and I didn’t read the recipe right and added 1/3 C flour instead of 1 1/3 C. We baked them for 2 hours and then never set. So we grabbed spoons and at them out of the pan.